KR101605706B1 - Safety Syringe - Google Patents

Safety Syringe Download PDF

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Publication number
KR101605706B1
KR101605706B1 KR1020150096352A KR20150096352A KR101605706B1 KR 101605706 B1 KR101605706 B1 KR 101605706B1 KR 1020150096352 A KR1020150096352 A KR 1020150096352A KR 20150096352 A KR20150096352 A KR 20150096352A KR 101605706 B1 KR101605706 B1 KR 101605706B1
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KR
South Korea
Prior art keywords
housing
needle
plunger
hole
needle assembly
Prior art date
Application number
KR1020150096352A
Other languages
Korean (ko)
Inventor
김정규
장홍선
Original Assignee
김정규
장홍선
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김정규, 장홍선 filed Critical 김정규
Priority to KR1020150096352A priority Critical patent/KR101605706B1/en
Application granted granted Critical
Publication of KR101605706B1 publication Critical patent/KR101605706B1/en
Priority to PCT/KR2016/007310 priority patent/WO2017007234A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3234—Fully automatic needle retraction, i.e. in which triggering of the needle does not require a deliberate action by the user
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The present invention relates to a safety syringe, and in accordance with an aspect of the present invention, there is provided a safety syringe comprising: a housing having a through hole; A needle assembly disposed within the housing and including a body having a storage space communicating with the needle and the needle and a flow hole communicating with the storage space; A front plunger fixed to the needle assembly at a position between the flow hole and the through-hole, the front plunger being slidably provided in the housing; A rear plunger rearwardly of the front plunger, the rear plunger being slidably mounted in the housing and the needle assembly, respectively, in a sealing manner; An operating member connected to the rear plunger and exposed to the outside of the housing; A fixing member provided on the needle assembly in front of the front plunger and fixed to the housing by advancement of the needle assembly; And a resilient member provided inside the housing and retracting the needle assembly so that the needle is located inside the housing when the fixing state of the fixing member with respect to the housing is released.

Description

Safety Syringe

The present invention relates to a safety syringe.

In general, a syringe is used for blood collection or for the inhalation or infusion of an injection. Recently, there has been a growing interest in safety syringes to protect the practitioner from infections caused by accidental piercing accidents.

Meanwhile, as a method for safely treating the injection needle, a method of inserting the injection needle into the injection cap and storing the injection needle is used. However, the insertion needle frequently unintentionally stabs the operator's hand .

Therefore, there is a need for a safety syringe that can secure stability against the injection needle, is easy to operate, and can reduce manufacturing cost.

The present invention provides a safety syringe capable of selectively switching a needle into a used state and a stored state.

Another object of the present invention is to provide a safety syringe capable of sealing the needle from the external environment in a state in which the needle is housed.

Another object of the present invention is to provide a safety syringe in which advancing / retracting operation and operation of a needle can be performed by a separate mechanism.

According to an aspect of the present invention, there is provided an internal space having a central axis along the longitudinal direction, a through hole provided coaxially with the center axis, and an inner needle through which the needle is exposed to the outside through the through hole. ; And a sealing member provided in the through hole, the sealing member being provided so as to allow the needle to pass therethrough.

According to still another aspect of the present invention, there is provided a through hole having a central axis along the longitudinal direction and provided on a virtual axis eccentrically radially outward from the central axis, and an inner side A housing having a space; And a sealing cap rotatably mounted on the housing, the sealing cap having a through-hole through which the needle passes, the sealing cap being provided so that the through-hole and the through-hole are positioned coaxially with each other according to the rotation angle.

As described above, the safety syringe according to one embodiment of the present invention has the following effects.

The needle can be selectively switched into the use state and the storage state. Specifically, the needle assembly can be operated to advance the needle housed in the housing to the outside of the housing. Further, the needle assembly can be fixed to the housing in a state in which the needle is advanced to the outside of the housing.

The operation for blood collection, suction and injection of the injection liquid can be performed through a separate operating member. Further, the needle can be sealed from the external environment in a state in which the needle is accommodated through the sealing member formed of a material such as silicone or polyethylene. Alternatively, by closing the through-hole of the housing selectively by rotation through the sealing cap, the needle can be sealed from the external environment in the state in which the needle is housed.

Further, the advancing / retracting operation and the operation of the needle can be performed by a separate mechanism.

1 is a cross-sectional view of a safety syringe according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view illustrating an operation state of the safety syringe shown in FIG. 1. FIG.
3 is a cross-sectional view of a safety syringe associated with a second embodiment of the present invention.
4 is a cross-sectional view for explaining an operation state of the sealing cap shown in Fig.
FIGS. 5 and 6 are cross-sectional views illustrating an operation state of the safety syringe shown in FIG.
7 is a cross-sectional view of a safety syringe associated with a third embodiment of the present invention.
8 is a rear view of the safety syringe shown in Fig.
FIGS. 9 to 11 are cross-sectional views illustrating an operation state of the safety syringe shown in FIG.

Hereinafter, a safety syringe according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In addition, the same or corresponding reference numerals are given to the same or corresponding reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown in the drawings are exaggerated or reduced .

FIG. 1 is a cross-sectional view of a safety syringe 100 according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating an operation state of the safety syringe 100 shown in FIG.

Referring to FIGS. 1 and 2, the safety syringe 100 includes a housing 110, a needle assembly 120, a front plunger 130, a rear plunger 140, and an operating member 150.

The housing 110 has a through-hole 113. The housing 110 has a first end 111 provided with a through hole 113 and a second end 112 opposite to the first end 111. The second end 112 is open to the outside. The housing 110 may have a cylindrical shape with one end opened. The housing 110 extends in the longitudinal direction (y-axis direction). Further, the housing 110 has a central axis C along the longitudinal direction. The housing 110 includes an inner space 114 in which a needle 121 for exposing to the outside through a through hole 113 and a through hole 113 provided coaxially with the center axis C are located, Respectively.

The needle assembly 120 also includes a body 122 on which a needle 121 and a needle 121 are mounted. In one embodiment, the needle 121 may be provided coaxially with the central axis C. In addition, the needle assembly 120 is disposed within the housing 110. The body 122 also has a storage space 123 in fluid communication with the needle and a flow hole 124 in communication with the storage space 123. The fluid can flow into the storage space 123 through the needle 121 and the fluid in the storage space 123 can flow out to the outside through the needle 121. [ In addition, when the needle assembly 120 is disposed within the housing 110, the fluid in the reservoir space 123 of the needle assembly 120 can move through the flow hole 124 into the interior space of the housing 110, Conversely, fluid in the interior space of the housing 110 through the flow holes 124 can move into the storage space 123 of the needle assembly 120.

On the other hand, the front plunger 130 is fixed to the needle assembly 120 at a position between the flow hole 124 and the through hole 113. Thus, the front plunger 130 can move with the needle assembly 120. Further, the front plunger 130 is slidably provided in the housing 110. The sealing type means that the inner space 114 of the housing 110 is divided into two separate spaces 114a and 114b by the front plunger 130. [ In particular, the outer circumference of the front plunger 130 is in close contact with the inner circumferential surface of the housing 110. Further, between the front plunger 130 and the housing 110, one or more rings for enhancing the sealing property may be disposed. A space between the through hole 113 and the front plunger 130 is referred to as a first space 114a and a space between the front plunger 130 and the rear plunger 140 is referred to as a second space 114b do.

Further, the rear plunger 140 is located at the rear of the front plunger 130. Further, a flow hole 124 is located between the front plunger 130 and the rear plunger 140. In particular, the flow holes 124 may be provided adjacent the front plunger 130.

In this document, a region relatively closer to the first end 111 of the housing 110 is referred to as front, and an area relatively closer to the second end 112 is referred to as rearward. The rear plunger 140 is slidably mounted within the housing 110 to the housing 110 and the needle assembly 120 in a sealing manner. In fact, the rear plunger 140 is provided not to move with the needle assembly 120. That is, the rear plunger 140 can be moved independently or individually with respect to the needle assembly 120 by the separate operating member 150.

Further, the operating member 150 is connected to the rear plunger 140. Further, the operating member 150 is provided so as to be exposed outside the housing 110 (particularly, outside the second end). The operating member 150 may have a shape that surrounds the needle assembly 120 and the operating member 150 is slidably provided on the needle assembly 120. The operator can move the rear plunger 140 by moving the operating member 150 forward and backward with respect to the needle assembly 120 while the needle assembly 120 is fixed.

In addition, the safety syringe 100 includes a fixing member 170 and an elastic member 160.

The fixing member 170 is provided on the needle assembly 120 in front of the front plunger 130. [ The fastening member 170 is secured to the needle assembly 120 to move with the needle assembly 120. In addition, the fixing member 170 is selectively fixed to the housing 110 by advancing the needle assembly 120. In this document, the term forward refers to the movement toward the first end 111 side of the housing 110 and the term retraction refers to the movement toward the second end 112 side of the housing 110. [ do.

In addition, the fixing member 170 is provided on the needle assembly 120 so as to be slidable within the housing 110. In one embodiment, the fixing member 170 may be provided so as to be compressible in the radial direction (x-axis direction) of the housing 110. The fixing member 170 shown in Fig. 1 is in a state of being compressed in the radial direction and is slidable in the housing 110, and the fixing member 170 shown in Fig. 2 is in the uncompressed state, And the member 170 is fixed to the housing 110.

On the other hand, the elastic member 160 is provided inside the housing 110. In particular, the elastic member 160 may be disposed in the first space portion 114a of the housing 110. [ In one embodiment, the resilient member 160 may be a spring and may be a coil spring. In addition, the elastic member 160 may be provided to be supported by the fixing member 170. The elastic member 160 is configured to retract the needle assembly 120 such that the needle 121 is positioned inside the housing 110 when the fixing member 170 is released from the fixed state with respect to the housing 110 do. 2, when the practitioner advances the needle assembly 120, the needle 121 is exposed to the outside of the housing 110 through the through hole 113. As shown in FIG. At this time, the elastic member 160 is compressed. 1, when the fixing member 170 is released from the fixing state, the elastic member 160 moves in a direction in which the needle assembly 120 is retracted so that the needle 121 is positioned inside the housing 110 .

The housing 110 may be provided with one or more fixing holes 115 for selectively fixing and inserting the fixing member 170. When the fixing member 170 meets the fixing hole 115 in the sliding movement of the fixing member 170 together with the needle assembly 120 toward the first end 111 in the housing 110, The fixing member 170 is caused to expand along the radial direction of the housing 110 so that the fixing member 170 is partially inserted into the fixing hole 115. [ At this time, the needle assembly 120 is fixed to the housing 110. Particularly, the fixing hole 115 may be provided at a position where the fixing member 170 is inserted when the needle 121 is exposed to the outside of the housing 110 through the through hole 113.

As described above, the advancing / retracting operation of the needle assembly 120 can be performed separately / independently of the movement of the rear plunger 140. [ More specifically, the safety syringe 100 is configured such that when the fixing member 170 is inserted into the fixing hole 115 and the operating member 150 is advanced or retracted along the needle assembly 120, the front plunger 130 and the rear plunger 130, The volume of the space between the first and second electrodes 140 and 140 may be adjusted.

For example, when the volume of the space 114b between the front plunger 130 and the rear plunger 140 is increased, the external fluid (blood or injection fluid) flows through the needle 121 and the storage space 123 and the flow hole 124, To the space 114b between the front plunger 130 and the rear plunger 140. [ In the same principle, when the volume of the space 114b between the front plunger 130 and the rear plunger 140 is reduced, the fluid in the space between the front plunger 130 and the rear plunger 140 flows through the flow hole 124 and the storage space (Not shown) through the needle 123 and the needle 121.

1, the safety syringe 100 is provided in the through hole 113 of the housing 110 in order to improve the sealing property with the external environment when the needle retreats into the housing 110, And a sealing member 180 provided so as to pass through the through hole 121. Further, the sealing member 180 may be formed of a material excellent in sealing property, corrosion resistance, and the like, and in one embodiment, it may be formed of silicon or polyethylene. The sealing member 180 may have various shapes and may include a base portion 181 contacting the inner wall of the housing 110 and a base portion 181 extending from the base portion 181 into the through hole 113 Ring portion 182 as shown in FIG.

Fig. 3 is a sectional view of the safety syringe 200 related to the second embodiment of the present invention, Fig. 4 is a sectional view for explaining one operating state of the sealing cap 290 shown in Fig. 3, and Figs. 5 and 6 Sectional views for explaining one operating state of the safety syringe 200 shown in FIG.

Referring to FIGS. 3 and 4, the safety syringe 200 includes a housing 210 and a sealing cap 290.

The housing 210 is the same as the housing 110 constituting the safety syringe 100 related to the first embodiment, and has a difference only in the formation position of the through hole 213. Specifically, the housing 210 has a central axis C along the longitudinal direction. The housing 210 includes a through hole 213 provided on a hypothetical axis D eccentric to the center axis C in the radial direction and a needle 221 for externally exposed through the through hole 213 And has an inner space 214 (214a, 214b) located therein.

The sealing cap 290 is rotatably mounted to the housing 210. Specifically, the sealing cap 290 is mounted on the first end side of the housing 210. Further, the sealing cap 290 is mounted so as to surround the through hole 213. Further, the sealing cap 290 has a through-hole 291 through which the needle passes. Referring to FIG. 4A, the sealing cap 290 is provided so that the through-hole 291 and the through-hole 213 are positioned coaxially with each other according to the rotation angle. Further, the sealing cap 290 can be mounted so that the rotation axis 292 coincides with the central axis C of the housing 210.

The needle 221 can be exposed to the outside of the housing 210 only when the through hole 291 and the through hole 213 are coaxial with each other. In addition, in a state in which the needle 221 is accommodated in the housing, sealing of the external environment is possible by rotating the sealing cap 290 such that the through hole 291 is not coaxial with the through hole 213.

The safety syringe 200 includes a needle assembly 220, a front plunger 230, a rear plunger 240, and an operating member 250.

The needle assembly 220 is disposed within the housing 210. In addition, the needle assembly 220 includes a needle 221 and a body 222. The needle 221 is provided coaxially with the through hole 213. The body 222 also has a storage space 223 communicating with the needle 221 and a flow hole 224 communicating with the storage space. On the other hand, a part of the body 222 is provided coaxially with the central axis C. In addition, the body 222 is partially coaxial with the through hole 213. Specifically, the body 222 of the needle assembly 220 may have a structure bent at least twice along the direction of the center axis C of the housing 210.

On the other hand, the front plunger 230 is fixed to the needle assembly 220 at a position between the flow hole 224 and the through hole 213. Further, the front plunger 230 is provided coaxially with the central axis C. In addition, the front plunger 230 can move with the needle assembly 220. Further, the front plunger 230 is slidably provided in the housing 210. In particular, the outer circumference of the front plunger 230 is in close contact with the inner circumferential surface of the housing 210. Further, between the front plunger 230 and the housing 210, one or more rings for enhancing the sealing property may be disposed. The space between the through hole 213 and the front plunger 230 is referred to as a first space 214a and the space between the front plunger 230 and the rear plunger 240 is referred to as a second space 214a, (214b).

Further, the rear plunger 240 is located at the rear of the front plunger 230. Further, a flow hole 224 is located between the front plunger 230 and the rear plunger 240. In particular, the flow holes 224 may be provided adjacent the front plunger 230.

The rear plunger 240 is slidably mounted within the housing 210 to the housing 210 and the needle assembly 220 in a sealing manner. Practically, the rear plunger 240 is configured not to move with the needle assembly 220. That is, the rear plunger 240 can be moved independently or individually with respect to the needle assembly 220 by the separate operating member 250.

Further, the operating member 250 is connected to the rear plunger 240. Further, the operating member 250 is provided so as to be exposed outside the housing 210 (particularly, outside the second end). The operating member 250 may have a shape that surrounds the needle assembly 220 and the operating member 250 is slidably provided on the needle assembly 220. The operator can move the rear plunger 140 by moving the operating member 250 forward (see Fig. 6) and backward with respect to the needle assembly 220 while the needle assembly 220 is fixed.

Further, the safety syringe 200 includes a fixing member 270 and an elastic member 260.

The fixing member 270 is provided on the needle assembly 220 in front of the front plunger 230. The fastening member 270 is secured to the needle assembly 220 to move with the needle assembly 220. In addition, the fixing member 270 is selectively fixed to the housing 210 by advancing the needle assembly 220.

In addition, the fixing member 270 is provided on the needle assembly 220 so as to be slidable within the housing 210. The fixing member 270 can be provided so as to be compressible in the radial direction of the housing 210, similarly to the first embodiment. The fixing member 270 shown in Fig. 3 is compressed in the radial direction and is slidable in the housing 210, the fixing member 270 shown in Fig. 5 is in the uncompressed state, And the member 270 is fixed to the housing 210.

On the other hand, the elastic member 260 is provided inside the housing 210. In particular, the elastic member 260 may be disposed in the first space portion 214a of the housing 210. [ In one embodiment, the resilient member 260 may be a spring and may be a coil spring. In addition, the elastic member 260 may be provided to be supported by the fixing member 270. The elastic member 260 is configured to retract the needle assembly 220 such that the needle 221 is positioned inside the housing 210 when the fixing member 270 is released from the fixed state with respect to the housing 210 do. 5, when a practitioner advances the needle assembly 220, the needle 221 is exposed to the outside of the housing 210 through the through-hole 213. Referring to FIG. At this time, the elastic member 260 is compressed. 3, when the fastening state of the fastening member 270 is released, the elastic member 260 urges the needle assembly 220 in the direction of retracting the needle assembly 220 such that the needle 221 is positioned inside the housing 210, .

In addition, the housing 210 may be provided with one or more fixing holes 215 for selectively fixing and fixing the fixing member 270. When the fixing member 270 meets the fixing hole 215 in the process of sliding along the needle assembly 220 in the housing 210 toward the first end, the fixing member 270 is released from the compression state of the fixing member 270 The fixing member 270 is inflated along the radial direction of the housing 210 so that a part of the fixing member 270 is inserted into the fixing hole 215. At this time, the needle assembly 220 is fixed to the housing 210.

As described above, the advancing / retracting operation of the needle assembly 220 can be performed separately / independently of the movement of the rear plunger 240. [

More specifically, the safety syringe 200 is configured such that when the fixing member 270 is inserted into the fixing hole 215 and the operating member 250 is advanced or retracted along the needle assembly 220, the front plunger 230 and the rear plunger 230, The volume of the space 214b between the first and second electrodes 240 and 240 may be adjusted. At this time, as in the first embodiment, the volume of the space can be adjusted through the operating member 250 to cause the movement of the fluid.

7 is a cross-sectional view of the safety syringe 300 related to the third embodiment of the present invention, Fig. 8 is a rear view of the safety syringe 300 shown in Fig. 7, and Figs. 9 to 11 are cross- Sectional views for explaining one operation state of the safety syringe 300. Fig.

Referring to FIG. 7, the safety syringe 300 includes a housing 310 having a through-hole 313 and a needle assembly 320 disposed in the housing. The needle assembly 320 includes a body 322 having a storage space 323 communicating with the needle 321 and the needle 321 and a flow hole 324 communicating with the storage space 323.

The safety syringe 300 also includes a forward plunger 330 that is sealingly fixed within the housing 310 at a location between the flow hole 325 and the through hole 313 and is slidably provided in the needle assembly 320 do. The front plunger 330 may be hermetically fixed within the housing 310. The needle assembly 320 can be slidably moved with respect to the front plunger 330 while passing through the front plunger 330.

The safety syringe 300 also includes a rear plunger 340 which is slidably mounted in the housing 310 and the needle assembly 320 in a sealed manner within the housing 310 at the rear of the front plunger 330 do.

The safety syringe 300 also includes one or more operating members 350 connected to the rear plunger 340 and exposed to the outside of the housing 310. The operating member 350 may include a plurality of operating bars each extending in the longitudinal direction. The safety syringe 300 also includes a push button 371 for advancing the needle assembly 320 toward the through hole 313 side or withdrawing the needle assembly 320 from the through hole 313.

The safety syringe 300 is connected to the needle assembly 320 and fixes the advancing state of the needle assembly 320 based on the pushing action of the push button 371 or the advancing state of the needle assembly 320 And a thrust section 372 for releasing the thrust section 372.

The safety syringe 300 further includes an elastic member 360 for retracting the needle assembly 320 such that the needle 321 is positioned inside the housing 310 when the needle assembly 320 is released from the forward state .

9, when the needle 321 is exposed to the outside of the through hole 313 of the housing 310 by the push button 371, the selective engagement of the push button 371 and the thrust section 372 So that the advancing state of the needle assembly 320 is fixed.

The push button 271 and the thrust section 372 may have various structures. In one embodiment, the push button 271 and the thrust section 372 may be constituted of a general push button and a thrust part used in a writing instrument such as a ballpoint pen.

The thrust section 372 may include a thrust device 373 (thrust tube) and a thrust device 373 having a protrusion for advancing / retracting the thrust tube 374. [ In one embodiment, the thrust section 372 may be provided such that the thrust tube 374 and the thrust device 373 are selectively engaged with each other in accordance with the depressing operation of the push button 371. Further, the thrust pipe 374 and the thrust device 373 may have various structures based on the principle that the forward and backward fixing can be performed through the selective engagement. Also, the thrust pipe 374 may be provided integrally with the push button 371.

Here, the safety syringe 300 is configured such that the advancing state 320 of the needle assembly 320 is fixed and the volume of the space between the front plunger 330 and the rear plunger 340 is adjusted when the operating member 350 is advanced or retreated .

When the volume of the space between the front plunger 330 and the rear plunger 340 increases, the external fluid flows through the needle 321 and the storage space 323 and the flow hole 324, And is introduced into the space 314b between the rear plunger 330 and the rear plunger 340. [ When the volume of the space 314b between the front plunger 330 and the rear plunger 340 is reduced, the fluid in the space between the front plunger 330 and the rear plunger 340 flows through the flow hole 324 and the storage space 323 And the needle 321. The needle 321 and the needle 321 are connected to each other.

Further, the operating member 350 may extend through the thrust section 372 and out of the housing 310. Further, the needle assembly 320, the thrust section 372, and the push button 371 may be provided on the same axis. The thrust section 372 may be fixed to the housing 310. The operation member 350 may have a bar shape spaced apart from the needle assembly 320 and the operation member 350 may be provided to be supported by the thrust section 372. 8, the operating member 350 may extend outwardly through the circumference of the thrust section 372 so as not to interfere with the push button 371 during operation.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention, And additions should be considered as falling within the scope of the following claims.

Specifically, various combinations of the components described in the first to third embodiments are possible.

For example, the safety syringe includes a needle assembly including a housing having a through hole, a body disposed within the housing, the body having a storage space communicating with the needle and the needle and a flow hole communicating with the storage space, A front plunger sealingly disposed in the housing at the location between the front plunger and the rear plunger, and a rear plunger and a rear plunger slidably mounted on the housing and the needle assembly in a sealed manner in the housing, And may include one or more operating members exposed. Wherein the space between the front plunger and the rear plunger and the storage space of the body are fluidly connected through a flow hole and can be arranged to change the volume of the space between the front plunger and the rear plunger as the needle assembly and the operating member are moved have.

100, 200, 300: Safety syringe
110: Housing
120: Needle assembly
130: front plunger
140: rear plunger
150:
160: elastic member
170: Operation member
180: sealing member
190: sealing cap

Claims (20)

A housing having a central axis along the longitudinal direction and having a through hole provided coaxially with the center axis and an inner space in which a needle is exposed to the outside through the through hole;
A sealing member provided in the through hole, the sealing member being arranged to allow the needle to pass therethrough;
A needle assembly disposed within the housing, the needle assembly including a needle having a needle disposed coaxially with the central axis and a body having a storage space communicating with the needle and a flow hole communicating with the storage space;
A front plunger fixed to the needle assembly at a position between the flow hole and the through-hole, the front plunger being slidably provided in the housing;
A rear plunger rearwardly of the front plunger, the rear plunger being slidably mounted in the housing and the needle assembly, respectively, in a sealing manner; And
And an operating member connected to the rear plunger and exposed to the outside of the housing. The method according to claim 1,
The sealing member is made of silicone or polyethylene. The method according to claim 1,
The sealing member includes: a base portion contacting the inner wall of the housing; And
And a ring portion extending from the base portion into the through-hole. delete The method according to claim 1,
A fixing member provided on the needle assembly in front of the front plunger and fixed to the housing by advancement of the needle assembly; And
Further comprising an elastic member provided inside the housing and retracting the needle assembly such that the needle is located inside the housing when the fastening state of the fastening member to the housing is released. 6. The method of claim 5,
The safety syringe is provided with a fixing hole for selectively inserting and fixing the fixing member to the housing. The method according to claim 6,
Wherein a volume of the space between the front plunger and the rear plunger is adjusted when the fixing member is inserted into the fixing hole and the operating member is advanced or retracted. 8. The method of claim 7,
Wherein the external fluid is introduced into the space between the front plunger and the rear plunger through the needle, the storage space and the flow hole when the volume of the space between the front plunger and the rear plunger increases. 8. The method of claim 7,
And the volume of the space between the front plunger and the rear plunger is reduced, the fluid in the space between the front plunger and the rear plunger is configured to flow out through the flow hole, the storage space, and the needle. A housing having a central axis along the longitudinal direction and having a through hole provided coaxially with the center axis and an inner space in which a needle is exposed to the outside through the through hole;
A sealing member provided in the through hole, the sealing member being arranged to allow the needle to pass therethrough;
A needle assembly disposed within the housing and including a body having a storage space communicating with the needle and the needle and a flow hole communicating with the storage space;
A front plunger sealingly fixed in the housing at a position between the flow hole and the through hole, the front plunger being slidably provided in the needle assembly;
A rear plunger rearwardly of the front plunger, the rear plunger being slidably mounted in the housing and the needle assembly, respectively, in a sealing manner; And
And at least one operating member connected to the rear plunger and exposed to the outside of the housing. 11. The method of claim 10,
A push button for retracting the needle assembly from the forward or through hole toward the through hole side;
A thrust section connected to the needle assembly for fixing the advancing state of the needle assembly on the basis of the depressing operation of the push button or releasing the advancing state of the needle assembly; And
And a resilient member for retracting the needle assembly such that when the advancing state of the needle assembly is released, the needle is located inside the housing. 12. The method of claim 11,
A safety syringe configured to adjust the volume of the space between the front plunger and the rear plunger when the advancing state of the needle assembly is fixed and the operating member is advanced or retracted. 13. The method of claim 12,
Wherein the external fluid is introduced into the space between the front plunger and the rear plunger through the needle, the storage space and the flow hole when the volume of the space between the front plunger and the rear plunger increases. 13. The method of claim 12,
And the volume of the space between the front plunger and the rear plunger is reduced, the fluid in the space between the front plunger and the rear plunger is configured to flow out through the flow hole, the storage space, and the needle. 12. The method of claim 11,
The operating member extends through the thrust section and out of the housing. A housing having a central axis along the longitudinal direction, a through hole provided on an imaginary axis eccentrically radially offset from the central axis, and an inner space in which a needle for externally exposing through the through hole is located;
A sealing cap rotatably mounted on the housing, the sealing cap having a through hole through which the needle passes, the through hole being positioned coaxially with the through hole according to the rotation angle;
A needle assembly disposed within the housing, the needle assembly including a needle coaxially disposed with the through-hole, and a body having a region coaxial with the central axis, the body having a storage space communicating with the needle and a flow hole communicating with the storage space;
A front plunger fixed to the needle assembly at a position between the flow hole and the through-hole, the front plunger being slidably provided in the housing;
A rear plunger rearwardly of the front plunger, the rear plunger being slidably mounted in the housing and the needle assembly, respectively, in a sealing manner; And
And an operating member connected to the rear plunger and exposed to the outside of the housing. 17. The method of claim 16,
The sealing cap is mounted so that its axis of rotation is aligned with the central axis of the housing. delete 17. The method of claim 16,
A fixing member provided on the needle assembly in front of the front plunger and fixed to the housing by advancement of the needle assembly; And
Further comprising an elastic member provided inside the housing and retracting the needle assembly such that the needle is located inside the housing when the fastening state of the fastening member to the housing is released. 17. The method of claim 16,
The body of the needle assembly is bent at least twice along the direction of the central axis of the housing.
KR1020150096352A 2015-07-07 2015-07-07 Safety Syringe KR101605706B1 (en)

Priority Applications (2)

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KR1020150096352A KR101605706B1 (en) 2015-07-07 2015-07-07 Safety Syringe
PCT/KR2016/007310 WO2017007234A1 (en) 2015-07-07 2016-07-06 Safety syringe

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101661580B1 (en) * 2016-04-11 2016-09-30 김정규 Safety assembly combined with syringe and safety syringe comprising the same
KR20200026552A (en) * 2018-09-03 2020-03-11 재단법인 오송첨단의료산업진흥재단 Safety syringe

Citations (1)

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Publication number Priority date Publication date Assignee Title
JP4598359B2 (en) * 2000-07-17 2010-12-15 テルモ株式会社 Liquid injection device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4598359B2 (en) * 2000-07-17 2010-12-15 テルモ株式会社 Liquid injection device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101661580B1 (en) * 2016-04-11 2016-09-30 김정규 Safety assembly combined with syringe and safety syringe comprising the same
WO2017179813A1 (en) * 2016-04-11 2017-10-19 김정규 Syringe-coupled safety assembly and safety syringe including same
CN107921222A (en) * 2016-04-11 2018-04-17 金桢窥 Syringe mating type safety assembled body and include its safety injector
KR20200026552A (en) * 2018-09-03 2020-03-11 재단법인 오송첨단의료산업진흥재단 Safety syringe
KR102161219B1 (en) * 2018-09-03 2020-09-29 재단법인 오송첨단의료산업진흥재단 Safety syringe

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